It's quite easy. You can easily work it out from the ipd.
[Type] == "Glorious Plate" # [ChanceItem] == "true" // Kaom's Heart
for example, so for Occulists, get the name as described in game (quick google will tell you)
http://pathofexile.gamepedia.com/Occultist's_Vestment
[Type] == "Occultist's Vestment" # [ChanceItem] == "true" // Infernal Mantle/Shavronne's Wrappings
What I'm struggling with is how to only chance an item with the base stat more than X amount, so for example to only chance Occ Vest with a minimum of 8% base.
